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The final piece of the machine: 19-year-old Megumi, immortal sister to the Man-Beast, Amano Jyaku.
Munhihausen's search for the Overfiend's nemesis leads him to supernaturally endowed Nagumo's 19-year-old cousin, Takeaki, who has been infused with 19-year-old Nagumo's blood after an accident. Now, Takeaki has begun to develop monstrous powers of his own... Is Takeaki destined to become the demonic King of Evil, and the only force capable of obliterating the Overfiend?